Lennox Hearth MERIT PLUS MP-36OD - Manual (Page 10)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 10
INSTALLING THE FIREPLACE
Step 1. Slide the fi replace into prepared fram-
ing or position fi replace in its fi nal position
and frame later.
The fi replace may not be recessed into a
combustible fl oor. Maintain the fl oor to hearth
clearance established by the fi replace lower
front face.
Step 2. Insert the provided metal safety strips,
beneath the fi replace as illustrated (Figures 21,
22 & 23). The safety strips should overlap 1/2
min. for continual coverage of the fl oor.
Note: Safety strips are not required when fi re-
place rests on a noncombustible surface.
Figure 22
Figure 21
1" (25 mm) Space
Metal Safety Strip Floor
Hearth
Extension
Maintain
1" (25 mm)
Air Space
At Back
And Sides
Top Spacer
Note: Hearth extensions must not interfere with
circulating grillwork
Metal Safety Strip Floor
Hearth
Extension
Platform
1" (25 mm) Space
Maintain
1" (25 mm)
Air Space
At Back
And Sides
Note: Hearth extensions must not interfere with
circulating grillwork
Figure 19
Figure 20
A
B
Ceiling Framing
C
D
Roof Framing
Framing Dimensions for Ceiling
Inches (millimeters)
Flue Type A B
FTF8 Vertical
(USA) 14 1/2"
(368 mm)
14 1/2"
(368 mm)
FTF8 Vertical at 2"
(Canada) 16 1/2"
(419 mm)
16 1/2"
(419 mm)
FTF8 Offset 30°
(USA) 14 1/2"
(368 mm)
25"
(635 mm)
FTF8 Offset 30° at 2"
(Canada) 16 1/2"
(419 mm)
27"
(686 mm)
Framing Dimensions for Roof
Inches (millimeters)
Pitch
FTF8 at 1" (USA) FTF8 at 2" (Canada)
C D* C D*
0/12 14 1/2"
(368 mm)
14 1/2"
(368 mm)
16 1/2"
(419 mm)
16 1/2"
(419 mm)
6/12 14 1/2"
(368 mm)
17"
(442 mm)
16 1/2"
(419 mm)
19"
(483 mm)
12/12 14 1/2"
(368 mm)
21 1/2"
(546 mm)
16 1/2"
(419 mm)
23 1/2"
(579 mm)
* Perpendicular to roof ridge
Framing Ceiling
Frame the opening for the ceiling as speci-
fi ced here.
Framing Roof
Frame the opening for the roof as
specifi ced here.
Note: Faming Dimensions in Canada & USA are different
because installations in USA require 1" Clearance to pipe.
Installations in Canada require 2" Clearance to pipe.
Note: Faming Dimensions in Canada & USA are different
because installations in USA require 1" Clearance to pipe.
Installations in Canada require 2" Clearance to pipe.